合抱的大树由细小的幼苗长成，九层的高台由一筐筐泥土堆起，千里远行从脚下第一步开始
动作发展应该是心理高层次的表现或反映，这是修理合乎自然发展逻辑的。
Artificial intelligence is an important driving force for a new round of scientific and technological revolution and industrial transformation.
The center of our galaxy is a fascinating place where extreme physics takes place, and it's a privilege to study it.
这个世界充满了渴望被爱的人。
Leadership means making tough decisions even when they are unpopular.